21512143150 has 12 divisors (see below), whose sum is σ = 40012586352. Its totient is φ = 8604857240.

The previous prime is 21512143127. The next prime is 21512143151. The reversal of 21512143150 is 5134121512.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21512143151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 215121382 + ... + 215121481.

It is an arithmetic number, because the mean of its divisors is an integer number (3334382196).

Almost surely, 2^21512143150 is an apocalyptic number.

21512143150 is a deficient number, since it is larger than the sum of its proper divisors (18500443202).

21512143150 is a wasteful number, since it uses less digits than its factorization.

21512143150 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 430242875 (or 430242870 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 25.

Adding to 21512143150 its reverse (5134121512), we get a palindrome (26646264662).

The spelling of 21512143150 in words is "twenty-one billion, five hundred twelve million, one hundred forty-three thousand, one hundred fifty".